| 2002 |
NEK8 was isolated as a beta-casein kinase activity and shown to have an N-terminal catalytic domain, a central RCC1-homology domain, and a C-terminal coiled-coil domain. It prefers beta-casein as substrate, is capable of autophosphorylation and oligomerization, and its kinase activity is not cell-cycle regulated. BICD2 (Bicaudal D2) was identified as a candidate substrate: NEK8 phosphorylates BICD2 in vitro, and the endogenous proteins co-immunoprecipitate in vivo. |
Biochemical purification from rabbit lung, in vitro kinase assay, co-immunoprecipitation, subcellular localization |
The Journal of biological chemistry |
Medium |
11864968
|
| 2004 |
Overexpression of a kinase-domain-mutant NEK8 in U2-OS cells led to a decrease in actin protein and a small increase in CDK1/cyclin B1 levels, suggesting a functional link to cytoskeletal regulation and G2/M progression. |
Overexpression of kinase-dead mutant in mammalian cells, western blot |
Gene |
Low |
15019993
|
| 2008 |
NEK8 localizes to the proximal portion of primary cilia and centrosomes in kidney epithelial cells; disease-associated RCC1-domain mutations (L330F, H425Y, A497P) disrupt ciliary and centrosomal localization without affecting ciliogenesis, mitosis, or centriole number. |
GFP-tagged construct overexpression in IMCD-3 cells, fluorescence microscopy |
Journal of the American Society of Nephrology : JASN |
Medium |
18199800
|
| 2008 |
NEK8 co-immunoprecipitates with polycystin-2 (PC2) but not polycystin-1 (PC1) in kidney tissue. The jck mutation does not abolish the NEK8-PC2 interaction but leads to abnormal phosphorylation of PC2, elevated PC1 and PC2 expression/mRNA, and ciliary accumulation of PC1 and PC2. |
Co-immunoprecipitation, western blot, real-time RT-PCR, immunofluorescence in jck mouse kidneys |
Journal of the American Society of Nephrology : JASN |
Medium |
18235101
|
| 2008 |
Mutations in the kinase and C-terminal RCC1 domains of NEK8 adversely affect ciliary targeting but do not affect ciliogenesis or ciliary length, indicating that kinase activity and the RCC1 domain are both required for proper ciliary localization. |
GFP-tagged constructs transiently expressed in vitro, fluorescence microscopy |
Pediatric nephrology (Berlin, Germany) |
Low |
18189147
|
| 2010 |
Inv/NPHP2 acts as a molecular anchor for Nphp3 and Nek8 in the proximal ciliary 'Inv compartment'; Inv is essential for compartmental localization of both Nphp3 and Nek8, whereas the localization of Inv itself does not require Nphp3 or Nek8, placing Nek8 downstream of Inv in this ciliary scaffold. |
Immunofluorescence localization in inv mutant mouse cells, genetic epistasis by knockdown |
Cytoskeleton (Hoboken, N.J.) |
Medium |
20169535
|
| 2011 |
NEK8 kinase activity is required for its own correct localization: the kinase domain alone is active but does not localize correctly, while the RCC1 domain localizes correctly and can be phosphorylated by NEK8. Centrosome recruitment is mediated by the RCC1 domain but requires autophosphorylation-induced conformational change. Induction of ciliogenesis upon cell cycle exit is accompanied by both activation and proteasomal degradation of Nek8, with activation dependent on phosphorylation within the catalytic domain. |
Nek8 kinase assays (in vitro), domain-deletion constructs, proteasome inhibitor treatment, fluorescence localization in mammalian cells |
Human molecular genetics |
High |
22106379
|
| 2012 |
NEK8-null mice die at birth with randomized left-right asymmetry and cardiac anomalies; Nek8 is required for nodal ciliary signaling (left-sided marker genes are misexpressed without ciliogenesis defect). NEK8 and polycystin-2 (PC2) proteins interact by co-IP; Nek8-null embryos express PC2 normally and PC2 localizes properly to cilia, but NEK8-depleted IMCD cells exhibit a defective response to fluid shear stress similar to cells lacking PC2. |
Nek8-null mouse generation, co-immunoprecipitation, fluid shear-stress assay, zebrafish morpholino knockdown |
Journal of the American Society of Nephrology : JASN |
High |
23274954
|
| 2012 |
Nek8 acts genetically downstream of Inv in zebrafish: nek8 mRNA rescues inv morphant phenotypes (pronephric cysts and cardiac looping defects), but inv mRNA cannot rescue nek8 morphant phenotypes. Simultaneous knockdown of nek8 and inv synergistically increases defect incidence. |
Zebrafish morpholino knockdown, mRNA rescue epistasis experiments |
FEBS letters |
Medium |
22687244
|
| 2012 |
NPHP9/NEK8 directly interacts with TAZ (a Hippo pathway effector) and induces nuclear translocation of the TAZ/NPHP9 complex. Binding of NPHP9 to TAZ is enhanced in a TAZ mutant unable to bind 14-3-3, suggesting competitive binding: 14-3-3 favors cytoplasmic retention of TAZ whereas NPHP9 mediates nuclear delivery. Downregulation of NPHP9 inhibits TAZ-dependent cell proliferation. |
Co-immunoprecipitation, nuclear/cytoplasmic fractionation, fluorescence microscopy, siRNA knockdown with proliferation assay |
Human molecular genetics |
Medium |
23026745
|
| 2013 |
ANKS6 connects NEK8 to the INVS-NPHP3 module at the proximal cilium. ANKS6 is hydroxylated by HIF1AN (as is INVS), which alters the composition of the ANKS6-INVS-NPHP3 complex. Network analysis places ANKS6 at the center of this NPHP module, explaining overlapping disease manifestations from mutations in ANKS6, NEK8, INVS, or NPHP3. |
Co-immunoprecipitation/complex purification, zebrafish and Xenopus knockdown, hydroxylation assay (HIF1AN), network analysis |
Nature genetics |
High |
23793029
|
| 2013 |
NEK8 is a key effector of ATR-mediated replication stress response: cells lacking NEK8 form spontaneous DNA double-strand breaks, show reduced replication fork rates, unscheduled origin firing, and increased fork collapse. NEK8 suppresses DSB formation by limiting cyclin A-associated CDK activity. A nephronophthisis-associated mutation in NEK8 specifically disrupts its genome maintenance function, and kidneys of NEK8-mutant mice accumulate DNA damage. |
siRNA/shRNA knockdown, DNA fiber assay, γH2AX foci, replication origin firing assay, CDK activity assay, mouse kidney immunostaining |
Molecular cell |
High |
23973373
|
| 2013 |
NEK8 loss-of-function mutations reduce PKD1 and PKD2 expression, upregulate c-MYC, and activate the Hippo effector TAZ. NEK8 and NPHP3 interact by co-immunoprecipitation and together activate TAZ. |
Patient-derived fibroblasts (loss-of-function due to nonsense-mediated decay), co-immunoprecipitation, western blot, RT-PCR |
Human molecular genetics |
Medium |
23418306
|
| 2015 |
ANKS6 is both a target and an activator of NEK8: ANKS6 requires NEK8 for localization to the ciliary inversin compartment (IC), and ANKS6 activates NEK8 by binding to its kinase domain. The Nek8(Roc) mutation inactivates NEK8 kinase function while preserving ANKS6 localization to the IC. The Anks6(Strkr) mutation decreases ANKS6-NEK8 interaction, precluding NEK8 activation. |
Mouse genetic models (Anks6^Streaker and Nek8^Roc point mutations), co-immunoprecipitation, in vitro kinase activity assay, immunofluorescence localization |
Nature communications |
High |
25599650
|
| 2016 |
NEK8 regulates the Hippo pathway effector YAP: NEK8 missense and loss-of-function mutations differentially affect YAP levels and its target gene expression in patient fibroblasts and renal cells. YAP imbalance was observed in Nek8-invalidated 3D spheroids and in cystic kidneys of jck mice. Inhibition of YAP with Verteporfin partially rescued 3D spheroid defects in Nek8-null cells and abnormalities in NEK8-overexpressing zebrafish embryos. |
Patient fibroblasts, mIMCD3 cells, 3D culture, zebrafish co-injection, Verteporfin pharmacological rescue, western blot for YAP target genes |
PLoS genetics |
Medium |
26967905
|
| 2016 |
NEK8 is required for efficient DNA damage-induced RAD51 foci formation and replication fork protection. NEK8 knockout cells show decreased RAD51 loading onto chromatin and nascent DNA tract degradation following replication stalling (hydroxyurea). Loss of NEK8 causes increased chromosome breaks after hydroxyurea treatment. |
siRNA screen, Nek8-knockout MEFs, DNA fiber assay, RAD51 chromatin loading assay, immunofluorescence foci |
Cell cycle (Georgetown, Tex.) |
Medium |
27892797
|
| 2022 |
NEK8 interacts with TAZ in adipocytes (co-immunoprecipitation) and suppresses TAZ expression, promoting adipocyte differentiation and lipid accumulation. Lentiviral NEK8 inhibition ameliorates high-fat diet-induced insulin resistance in a mouse model. |
Co-immunoprecipitation, confocal immunofluorescence, shRNA knockdown, western blot, in vivo HFD mouse model |
Oxidative medicine and cellular longevity |
Low |
36506932
|
| 2023 |
NEK8 phosphorylates c-MYC at serine 405 in colorectal cancer cells, which enhances c-MYC protein stability via polyubiquitination. |
In vitro kinase assay, phospho-specific antibody, ubiquitination assay, site-directed mutagenesis (S405A), western blot |
Cell communication and signaling : CCS |
Medium |
37596667
|
| 2023 |
NEK8 kinase-domain missense variants (e.g. p.Arg45Trp, p.Lys157Gln) associated with autosomal dominant PKD show reduced kinase activity in vitro, decrease polycystin-2 (but not ANKS6) localization in cilia, and increase DNA damage signaling (γH2AX) in patient-derived tubuloids and IMCD3 cells. |
In vitro kinase assay, Nek8-knockout IMCD3 cell rescue with variant constructs, immunofluorescence for ciliary polycystin-2, γH2AX foci in patient tubuloids |
Kidney international |
High |
37598857
|
| 2025 |
USP51, a deubiquitinase, directly interacts with NEK8 (co-immunoprecipitation, co-immunofluorescence) and lowers the ubiquitination level of NEK8 protein, thereby stabilizing it. NEK8 promotes colorectal cancer progression partly via activation of the WNT/β-catenin pathway, as NEK8 knockdown decreases β-catenin protein levels. |
Co-immunoprecipitation, co-immunofluorescence, ubiquitination assay, functional rescue experiments, western blot for β-catenin |
Pathology, research and practice |
Medium |
41475333
|
| 2025 |
NEK8 directly interacts with asparagine synthetase (ASNS) and phosphorylates it at serine 349, inhibiting ASNS ubiquitination and degradation. This stabilization of ASNS promotes asparagine synthesis and activates the mTORC1 pathway in gastric cancer cells. |
Co-immunoprecipitation, in vitro kinase assay, ubiquitination assay, site-directed mutagenesis (ASNS-S349A), metabolic profiling, mTORC1 pathway readouts |
Molecular medicine (Cambridge, Mass.) |
Medium |
39762761
|
| 2025 |
NEK8 overexpression inhibits RAD51 focus formation, causes a defect in homologous recombination, and leads to degradation of stalled replication forks. NEK8-overexpressing cells are sensitized to the PARP inhibitor Olaparib. |
NEK8 overexpression in mammalian cells, RAD51 immunofluorescence foci, DNA fiber assay, Olaparib sensitivity assay |
DNA repair |
Medium |
41101173
|
| 2026 |
NEK8 phosphorylates lactate dehydrogenase A (LDHA), driving lactate overproduction in colorectal cancer cells. Elevated lactate promotes histone modifications silencing antigen presentation machinery and impairs CD8+ T cell function. Pharmacological NEK8 inhibition with CX6258 restores CD8+ T cell infiltration and enhances tumor control after radiotherapy. |
In vitro kinase assay (NEK8 phosphorylating LDHA), histone modification analysis, CD8+ T cell functional assays, pharmacological inhibition (CX6258), in vivo tumor model |
Nature communications |
Medium |
41904143
|